linux-kernel - Re: get_zone_device_page() in get_page() and page_cache_get

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Message-ID: <CAPcyv4iFhpSo-nbypHuZVZz7S92PwPx17bxUgMsksRHYPQkqEA@mail.gmail.com>
Date:   Mon, 24 Apr 2017 11:41:51 -0700
From:   Dan Williams <dan.j.williams@...el.com>
To:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc:     "Kirill A. Shutemov" <kirill@...temov.name>,
        Linux MM <linux-mm@...ck.org>,
        Catalin Marinas <catalin.marinas@....com>,
        "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
        Steve Capper <steve.capper@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Borislav Petkov <bp@...en8.de>, Rik van Riel <riel@...hat.com>,
        Dann Frazier <dann.frazier@...onical.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Michal Hocko <mhocko@...e.cz>,
        linux-tip-commits@...r.kernel.org
Subject: Re: get_zone_device_page() in get_page() and page_cache_get_speculative()

On Mon, Apr 24, 2017 at 11:25 AM, Kirill A. Shutemov
<kirill.shutemov@...ux.intel.com> wrote:
> On Mon, Apr 24, 2017 at 09:01:58PM +0300, Kirill A. Shutemov wrote:
>> On Mon, Apr 24, 2017 at 10:47:43AM -0700, Dan Williams wrote:
>> I think it's still better to do it on page_ref_* level.
>
> Something like patch below? What do you think?

>From a quick glance, I think this looks like the right way to go.